Merge pull request #305 from alex/show-the-backend

Always show where a baackend comes form in the docs
diff --git a/docs/index.rst b/docs/index.rst
index a1a650a..2263c32 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,10 +1,6 @@
 Welcome to ``cryptography``
 ===========================
 
-.. warning::
-
-    ``cryptography`` is very young, and very incomplete.
-
 ``cryptography`` is a Python library which exposes cryptographic recipes and
 primitives. We hope it'll be your one-stop-shop for all your cryptographic
 needs in Python.